Unstable internet causes program to slow down

Hi, We have a JavaFx Web Start application with some cron jobs synchronizing with a server via web services. When running in our test environment everything runs fast and stable for at least days. In the test environment, the internet connection is very good.

The problem comes when moving to the production environment. Same hardware, the only difference is that the internet connection is a usb dongle - and the signal is very bad.